chore(rln-relay): updated metrics for testnet 3 (#1744)

* fix(rln-relay): trace log

* chore(rln-relay): updated metrics for testnet 3

fix(rln-relay): group manager metric import

waku/v2/waku_rln_relay/group_manager/group_manager_base.nim

@@ -1,5 +1,6 @@
 import
   ../protocol_types,
+  ../protocol_metrics,
   ../constants,
   ../rln
 import
@@ -13,6 +14,7 @@ export
   chronos,
   results,
   protocol_types,
+  protocol_metrics,
   deques
 
 # This module contains the GroupManager interface
@@ -148,6 +150,7 @@ method generateProof*(g: GroupManager,
     return err("identity credentials are not set")
   if g.membershipIndex.isNone():
     return err("membership index is not set")
+  waku_rln_proof_generation_duration_seconds.nanosecondTime:
     let proofGenRes = proofGen(rlnInstance = g.rlnInstance,
                               data = data,
                               memKeys = g.idCredentials.get(),

waku/v2/waku_rln_relay/group_manager/on_chain/group_manager.nim

@@ -75,6 +75,7 @@ method atomicBatch*(g: OnchainGroupManager,
   initializedGuard(g)
 
   let startIndex = g.latestIndex
+  waku_rln_membership_insertion_duration_seconds.nanosecondTime:
     let operationSuccess = g.rlnInstance.atomicWrite(some(startIndex), idCommitments, toRemoveIndices)
   if not operationSuccess:
     raise newException(ValueError, "atomic batch operation failed")
@@ -371,6 +372,7 @@ method startGroupSync*(g: OnchainGroupManager): Future[void] {.async.} =
     g.idCredentials = some(idCredential)
 
     debug "registering commitment on contract"
+    waku_rln_registration_duration_seconds.nanosecondTime:
       await g.register(idCredential)
     if g.registrationHandler.isSome():
       # We need to callback with the tx hash
@@ -427,6 +429,7 @@ method init*(g: OnchainGroupManager): Future[void] {.async.} =
   g.membershipFee = some(membershipFee)
 
   if g.keystorePath.isSome() and g.keystorePassword.isSome():
+    waku_rln_membership_credentials_import_duration_seconds.nanosecondTime:
       let parsedCredsRes = getMembershipCredentials(path = g.keystorePath.get(),
                                                     password = g.keystorePassword.get(),
                                                     filterMembershipContracts = @[MembershipContract(chainId: $chainId,